“Sexuality is everywhere on our city walls and on our screens, in lighter news or in darker events,” said Nadine Cattan, research director in geography at France’s National Center for Scientific Research.

“We wanted to cover all this worldwide to try and understand it a bit better,” she said, adding the research had lasted 18 months.

The atlas covers multiple areas, such as what it calls a “sexual and amorous transition” happening in Europe, where infidelity is on the rise.

Using data drawn across five European countries from the 1.5 million members of Gleeden — a dating site for married people who want affairs — the atlas pinpoints Paris as the city where most people are unfaithful.

According to the data, more than half of those who cheat on their partners are highly educated, and 22 percent work in finance, banking or insurance. The major reason cited for infidelity is a desire to test their seduction power.

In Greece, Poland and Brazil, some 80 percent of the population think sex is very important, while in Thailand and Japan just 38 percent do, it says.

In Europe, people in Britain, Norway and Sweden are the most avid users of sex toys, citing a report by condom maker Durex, while southern countries including France are not that interested.

It adds that many countries have taken measures to address sexual harassment, such as women-only bus lines in Mexico and similar initiatives in cities in Brazil, Egypt and Japan.